HydroBASINS lev08 watershed · #4080801390
Bassin de 沅江
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 2 administrative regions : Changde, Yiyang
Sub-basin area
374,7km²
Upstream area
93 287,1km²
Discharge
2 105,96m³/s
Mean elev.
37m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de 沅江1466 km²
- Bassin de 向阳河913 km²
2 dept-equivalent regions (GADM L2)
- 187.3 km²50.1% of basin
- 186.9 km²49.9% of basin
1 intersecting protected areas
Nan Dongting Wetland & Waterfowl Reserve
IUCN Not ReportedWetland of International Importance (Ramsar Site)
26.69 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
65 distinct species · 127 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 12 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de 沅江 : 12 espèces reliées par 7 interactions GloBI sur 2 types (connectance 10.6%, filtre Serrano α=0.2).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
17,4°C
Annual rain
1 332mm
Moisture idx (CMI)
0,18
Runoff
651mm/an
PET
1 095mm
AET
991mm
Mean slope
0,6°
Water table
32cm
Forest
26%
Crops
42%
Urban
9%
Protected
61%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)